Open-source, tri-platform mobile (iOS, Android and web) online multiplayer game, built using React Native, React Native for Web, Redux, Expo, Firestore, and Firebase Cloud functions. Play Tic Tac Toe cross-platform, either online or in-person with your friends. Registration is not needed, instead, anonymous lobby id's are utilized. Therefore only you and the one you're playing with online know who is playing with who.

GitHub repo: https://github.com/andordavoti/tic-tac-toe-app

Reddit post 1: https://www.reddit.com/r/reactnative/comments/h8rwi5/online_game_with_firebase/

Reddit post 2: https://www.reddit.com/r/reactnative/comments/hgf317/tri_platform_reactnative_game_with_expo_firestore/